From: Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
Date: Tue, 24 Jan 2017 15:32:48 +0000 (+0530)
Subject: add org-bullet, beautiful utf-8 bullets
X-Git-Url: https://git.rkrishnan.org/?a=commitdiff_plain;h=8daf5c1ac3bf0fa3a24bcbce9abe841b54ad8b01;p=.emacs.d.git

add org-bullet, beautiful utf-8 bullets
---

diff --git a/elisp/org-bullets.el b/elisp/org-bullets.el
new file mode 100644
index 0000000..b161148
--- /dev/null
+++ b/elisp/org-bullets.el
@@ -0,0 +1,126 @@
+;;; org-bullets.el --- Show bullets in org-mode as UTF-8 characters
+;;; Version: 0.2.4
+;;; Author: sabof
+;;; URL: https://github.com/sabof/org-bullets
+
+;; This file is NOT part of GNU Emacs.
+;;
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 3, or (at
+;; your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program ; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; The project is hosted at https://github.com/sabof/org-bullets
+;; The latest version, and all the relevant information can be found there.
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+
+(defgroup org-bullets nil
+  "Display bullets as UTF-8 characters"
+  :group 'org-appearance)
+
+;; A nice collection of unicode bullets:
+;; http://nadeausoftware.com/articles/2007/11/latency_friendly_customized_bullets_using_unicode_characters
+(defcustom org-bullets-bullet-list
+  '(;;; Large
+    "◉"
+    "○"
+    "✸"
+    "✿"
+    ;; ♥ ● ◇ ✚ ✜ ☯ ◆ ♠ ♣ ♦ ☢ ❀ ◆ ◖ ▶
+    ;;; Small
+    ;; ► • ★ ▸
+    )
+  "This variable contains the list of bullets.
+It can contain any number of symbols, which will be repeated."
+  :group 'org-bullets
+  :type '(repeat (string :tag "Bullet character")))
+
+(defcustom org-bullets-face-name nil
+  "This variable allows the org-mode bullets face to be
+ overridden. If set to a name of a face, that face will be
+ used. Otherwise the face of the heading level will be used."
+  :group 'org-bullets
+  :type 'symbol)
+
+(defvar org-bullets-bullet-map
+  '(keymap
+    (mouse-1 . org-cycle)
+    (mouse-2
+     . (lambda (e)
+         (interactive "e")
+         (mouse-set-point e)
+         (org-cycle))))
+  "Mouse events for bullets.
+Should this be undesirable, one can remove them with
+
+\(setcdr org-bullets-bullet-map nil\)")
+
+(defun org-bullets-level-char (level)
+  (string-to-char
+   (nth (mod (1- level)
+             (length org-bullets-bullet-list))
+        org-bullets-bullet-list)))
+
+;;;###autoload
+(define-minor-mode org-bullets-mode
+    "UTF8 Bullets for org-mode"
+  nil nil nil
+  (let* (( keyword
+           `(("^\\*+ "
+              (0 (let* (( level (- (match-end 0) (match-beginning 0) 1))
+                        ( is-inline-task
+                          (and (boundp 'org-inlinetask-min-level)
+                               (>= level org-inlinetask-min-level))))
+                   (compose-region (- (match-end 0) 2)
+                                   (- (match-end 0) 1)
+                                   (org-bullets-level-char level))
+                   (when is-inline-task
+                     (compose-region (- (match-end 0) 3)
+                                     (- (match-end 0) 2)
+                                     (org-bullets-level-char level)))
+                   (when (facep org-bullets-face-name)
+                     (put-text-property (- (match-end 0)
+                                           (if is-inline-task 3 2))
+                                        (- (match-end 0) 1)
+                                        'face
+                                        org-bullets-face-name))
+                   (put-text-property (match-beginning 0)
+                                      (- (match-end 0) 2)
+                                      'face (list :foreground
+                                                  (face-attribute
+                                                   'default :background)))
+                   (put-text-property (match-beginning 0)
+                                      (match-end 0)
+                                      'keymap
+                                      org-bullets-bullet-map)
+                   nil))))))
+    (if org-bullets-mode
+        (progn
+          (font-lock-add-keywords nil keyword)
+          (font-lock-fontify-buffer))
+      (save-excursion
+        (goto-char (point-min))
+        (font-lock-remove-keywords nil keyword)
+        (while (re-search-forward "^\\*+ " nil t)
+          (decompose-region (match-beginning 0) (match-end 0)))
+        (font-lock-fontify-buffer))
+      )))
+
+(provide 'org-bullets)
+
+;;; org-bullets.el ends here